Antifriction sliding bearing



Dec. 11 1923.

DE WITT (.1` HARRIS ANTIFRLCTION SLDING BEARING Filed Sept. l. 1921 AT1-Ys.

o the typewriter carriage.

Patented Der, ll, 1923.

Unirse stares- DE WITT'CLINTON imams, or iuimnnivn,` FLonInAf. Y

ANTIFRICTION SLIDING BEARING. v

Application filed SeptemberL l1921. SerialNo. 497,650..

To all whomz'maf/ concern.' Y 4 Be it known that I, I/Vrr'rfC'. HARRIS, a citizen. of theUnitedStates, residing'at Pineland,` inytlie countyof 'Leeandf State Florida, have invented certain. new and.

useful. Improvements. in Antifriction Slid-4 ing Bearings, of which 4the followingjisa' specic-ation. y I

The inventionrelates to` anti-friction devices, especially as applied to relatively slidable. parts. Y

One of the objects ofthe invention is .to

provide a rolling bearing between relatively slidable members in which the .rolling ele-.

ments may travel in an endlessraceway thereby avoiding thebinding and increased. friction consequent'uponthe stoppage of the free movement of the. rollingelements at the ends .of a straight -racewayy Another'object isito provide araceway for the rolling elements. Whichis capable of. a pivotalv movement permitting theperfect alinement at allv times of .the .loadecarrying portionof the racewaywith- .its .supporting I track. y

Another object is to providesuch a..bear.. ingdevice which is ofverysimple construc. tion and comprisesfpartswhich are inex-y pensive to manufacture.y Y

Other objects. and advantages will. be

apparent in.' the followingidetailed descrip.

tion of apreferredembodiment of myin# vention. .Which I yhave .illustrated- 'in Athe .ac-

companying drawings Yas` incorporated .with

the carriage slideways in a typewriter..

Fig. l of the drawings `is a plan .view of my devicens associatedfwiththe slide members ofV atypewrite-r carriage and frame.

Fig. 2 is asidel viewv and.Fig. 3 anend:

vien7 oftheA same.: F ig-' 4 is `horizontal sectional view of the device and Fig. 5.a

vertical section ofthe same. Fig. 6 `-isal detail .view of onecf the bearing plates.

.Fig 7 is anf'end elevation of the `tWo bearf. ving plates'and spacer blocks..

Referring to Figs. l, 2 and 3,. .the numeral l indicates a. horizontal vbar. rigidly fixed upon the typewriter frame and Whichvformsi the slideWay-folr the lateral movement .of

bers of the-'carriage'is indicated iat 2.v` My device as illustrated herein maybemounted on the carriage-member V2 asindicated at a and 4, andarranged to bear. upon .a-suit-V Orne of the meme.VV

. able lWay, formed inthe `upper surfacelo'f..

they bar'l. f Yills illustrated in Figs. t andl, theedevice comprises a pairof spaced plates 5" and 6V formed of hardened'metal and rigidlyjsel cured Vto each otherA means oflspacer blocks 7 yand 8 preferablyrswaged'iat *eachV` end into oppositely positioned lapertures entrar ferries;

formed in the plates-.5 and 6.V The platesI A 5`and 6 are of like form, .their peripheri'esl in' the present instance beingY shaped with". rectilinear uppery and lowersides the lower sidesV being. inwardly beveled,- and Withcurved-ends. The peripheral edgeslof 4the spaced plates form` a continuousraceWayi for a..plurality of anti-frictioniballs 9,'ofa sufficient number to lie in substantiallyconf, tinuousA relation entirely about the bearing;l edges ofthe plates... l

. The balls are. held (in. posi-tion upon the raceway by a sectional casecomprisingtwo.

cup-shaped members lO andlllf which, .Wl-ien" assembled .'.With .the f plates 5 and. 6 with'.v the edges `in abutment, `.serve `to retain. the 4 balls innposition upontlie. raceway. The-.lower portion: of reach case .member fis cutk avv-ay to; partially`V expose Vthose of. the yballs Whichl are positioned upon. the- `lower rectilinear.: portion ofthe raceway so. that. ,they may bear upon. the `.supportinglbar l.N l

Tol form. a suitable way or. track for.l the. travel of tlieballs uponfthe barl, a channel.; l2 may be. cutlongitudinally yin the nupper.

surface .of the bar, and formed .With inclinedf` the extended portion illust-rated at .17,1l .and

having a cylindrical' portionlS.. projecting. through centrally locatedibearing .apertures formed in .the spaced` raceWay plates and in; the two members forming the ballretaining case. It will .be obvious thattheassembled bearingdevice may rotateor rock abouti-the` pivot stud,.thus enabling thedevice to. adi.

just itself to any slight irregularities or curvatures in the supporting tracks, whereby each of the balls in bearing contact with the track may bear its proportionate part of the load by virtue of their sel-alinement.

For the purposefot1 limiting this rotative movement within a practical arc of movement I have provided a projectinghead 19 upon the rivet 14; which extends into an opening 20 in the carriage member 2, the opening being of somewhat larger diameter than the diameter of the projecting head. I have found that the desirable results to be obtained by the pivotal movement of the bearing in the construction illustrated horein necessitate only a slight arc of movement in the latter, and a comparatively slight amount of play between the projecting head and the walls of the opening is lsuiiicient to permit alinement at all times between the bearing balls and the track upon which they run.

The bearing device is further supported by means of an angular bracket 21 having one end secured to the carriage member as at 22, and its angle portion secured at the louter end of the pivot stud 16 by means of the screw-threaded extension 23 and nut 24. The angle portion of the bracket is formed Awith an inwardly dished section 25 abutting the shoulder 26 near the outer endk of the pivotrstud, thereby forming with the hanged portion of the stud a pair of lateral abutments for the case members, to retain the bearing device in position. T he shoulder 26 preferably is positioned slightly outward from the outer case member, and the journal portion 18 of the pivot stud preferably is ot slightly less` diameter than its bearing apertures in the case members and race plates, thus providing -for a slight lateral movement of the bearing device to facilitate its self alinement with the track way. Another arm 27 of the bracket 21 extends downwardly'and is curved beneath the track rod 1 to prevent the upward displacement of the bearing device. It will be noted that the spaced plates and the sectional retaining case may be formed from sheet metal stock by simple and inexpensive stamping means.

It will now be apparent that I have provided an antifriction bearing between relatively slidable members which is self-alim ing as to the bearing elements, which by reason of the continuously free movement of the bearing element-sy reduces friction to a minimum, and is of simple enduring construction.

I claim as my invention: f

l. A device of the class described having, in combination with a sliding element, a plurality of rolling bearing elements, an endless racewa therefor, and means for retaining said e ements in said raceway arn ranged to expose certain of said elements successively for bearing contact with a track, said device being pivotally mounted on said sliding element to permit selfalinement of said contacting elements with the track.

2. In combination, a sliding element, a track and a roller bearing device interposed between said element and track, said device havin@ a rectilinear bearing portion with guided contact on the track, connecting Vmeans for said element and device comprising two pivotal pins and bearings, the pins being loose in the bearings whereby alimited vertical and lateral motion of the bearing device is obtained,one of said pins passing through the device Vand having a retaining means thereon to secure the device tothe element.

3. A device of the class described comprising, in combination, a pair of like spaced plates the peripheries of which form a continuous raceway, arplurality of anti-friction balls positioned in said raceway, a sectional case adapted Vto retain said balls in said raceway and permit bearing contact between certain of said balls and a track, and a pivotal support for saidy plates having its axis perpendicular to the plane of move ment of said balls.

t 4. In combination with a stationary member and a movable member -slidably supported thereon, an. anti-friction bearing def vice comprising a part forming an endless raceway, a plurality of rolling bearing elements, means for retaining said elements in said raceway adapted to permit bearing contact between certain of said elements and one of said members, a pivotal support for said part carried by the other of said members and arranged transversely to said raceway, a lug ixedon said part yand projecting into an opening in said last mentioned member, said opening being adapted mensions, spacer blocks securing said plates in rigid inter-relation, rolling bearing elements positioned for continuous travel about the peripheries of said plates, a pair ofrop-` positely positioned casing members adapted to retain said bearing elements in position about said yplates and means for securing said casing members to said plates.

6. A device of the class described having, I

in combination, a plurality of rolling bearing elements, a member forming an' endless raceway therefor, means for retaining said elements in said raceway arranged to ex-V pose certain of said elements successively for bearing contact with a track, said mem`V ber being pivotally mounted to permit selfalinement of said contacting elements with the track, and means adapted to limit the pivotal movement of said member.

7. In a device of the class described, a pair of spaced plates adapted to form a continuous raceway, a plurality of anti-friction bearing' elements positioned in said raceing said elements in said raceway and arranged to enclose the same except a portion of said elements successively exposed for bearing contact with a track, said plates and said casing members being struck from sheet material.

8. In combination with a sliding element and a track, a bearing device comprisin a plurality of aligned rollers in contact with the track, a supporting body for said rollers, a rocking connecting means between said element and said device comprising two pivotal pins with oversized bearings therefor, and means for maintaining said pins loosel in said bearings.

9. n a device of the class described, a casing comprising parallel plates interfitting to form an endless raceway, a plurality of rolling elements filling said raceway, means on said casing to maintain the rolling eleway, and a pair of casing members retain-V ments in said raceway, a portion of said casing being cuty away to expose the rolling elements to a supporting track, and a single supporting means passing Y transversely through the casing to connect the device toV an element to be supported on said supporting track.

10. A typewriter having, in combination, a track, a carriage slidably supported on the track, a plurality of anti-friction roller devices for supporting the carriage, each device having roller bearing elements contacting the track, said elements moving in a continuous raceway within the device, a bracket on the carriage having a pivotal pin with extremities supported inV said bracket and carriage, said pin passing through an opening in the roller device whereby the latter is pivotally attached to the carriage, and a lug extending parallel to said pin into an opening in saidl carriage, said second opening being larger than the lug to limit the motion oi' the roller device about its pivotal pin.

In testimony whereof, I have hereunto set my hand.

DE WITT CLINTON HARRIS. 

